Improvement in car-springs



'1". F. ALLYN.

t 016,1 Spring. v 119.101,563. Patented April 5, 1870.

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Letters Patent No. 101,563, dated April 5, 1870.'

IMPROVEMENT IN CAR-SPRINGS.

The Schedule referred to`in these LettersPatent and making part of the same.

had to the annexed drawings makinga part ot' this specification, inwhich- Figure 1 is a tcp view, and Figure 2, a longitudinal the center of said spring.

- The nature'of this invention consists in the construction of a railroad car-spring, in a simple and compactrnanner,. w\ith the smallest number of lseparateparts, easily detachedand applied, to admit of convenient packing for' shipment; l

Also, in the construction of a car-spring in such a manner that its maximum Ipressing will always admit of elasticity ot' its diiierent parts, in themanner' hereinafter described;

Also, in the constructionand arrangement of a follower or frame, to be applied tothe upper surface of the spring, in such a manner as to have only'two hearing-surfaces upon such spring, and said surfaces being yielding or nrovablc, in order to adapt thernselves to the curvature of the spring.

A represents the bolster or trarne ofthe railroad car.

B are metallic cups, fastened in any secure or desirable .Way to said frame.

G are pieces of rubber, itting into `and approximating in form to the cups B; .or the frame A may be dispensed with','and may form apart or portion of a. casting, .upon which are formed the cups B, the whole beim.r in one piece.

The above i'r'arne and cups are nrade ofsuiicient width to admit of said cups receiving two or more sets of steel springs, the ends oi which rest respectively upon the rubber' C, contained with tlr'e cups B. These springs, D, may or may'not be of equal length and thickness,

A flame, E, is applied to the upper side of the springs D, and is constructed very much like the lower frame A, it being of metal, and having cast upon its ends cups F, conforming in size and shape to the cups B, and within which is placed the pieces ofrubber G.

lhe frame E is about one-half the length of the frame A,'and is placed centr'ally'upon it, so that the bearing-surfaces, or' iulcr'a, may be equallyd'istributed upon the spring.

The weight of the car resting upon the top of the i'rame E, has four points of contact upon the spring, to wit: two points being upon the ends of the spr-irri` sectional view, through the latter' being and two point-s at about oncqnarter of the distance from each end of the same when the spring is in its normal position. Y v

The upper fr-ame E is confined to the lower frame ol'vbolster A by means of a suitable bolt, or bolts, that are so arranged asto allow thefree action and playof the spring.

When the car is heavily laden, the springs may become so rnnch depressed in the center as to come inl contact with t-lre frame A. Ilhis fact does not destroy the eii'ect of the spring, nor impair' its function'.

I place a piece of rubber either upon the center of the lower frame or conned within a cup, constructed as above described, and which crrp may be cast upon or fastened in the center' of said lower frame or' bolster', thereby affording a yielding surface and fulcrurn, so that the spaces leftvbetween this fulcrurn and the ends of the spring will continue to form an elastic mediurnfor the superincunibent weight, as illustrated in dotted lines in fig. 2.

In the foregoing description I have stated that the frames and cups may be made of metal, cast or other- .-wise, each frame and its cup being'in one piece; but., -it' desired, the cups alone may beso madev of rrretal,

cast or otherwise, and attached in any suitable marrner to wooden holst-ers or' frames, and subservethe same purposes.

Figure 3 shows a sectional View, ,taken through the line x x,- g. 2, and is intended ,to illustrate the' mode of construction of the bearing-surface of the cup F, and the vbearing-surface of' the cup B, being made in'the same manner.

a a a a are corrugations, formed within such bearing-surface, of either a square orrounding surface,

cut or fracture the rubber. These corrugatious may be made either straight across the surface, or angular, each alternate corrugation being wider than the other, which mode of construction allows a greater expansion of thepr'nbberwithin the cup, and equalizes the pressure upon the rubber' when the spring is dellected. v

1t is apparent that other.' elastic material may be used in the place ot' the India rubber referred to as above, or that wood may be applied in such a mauncr as. to afford a bearing-surface, the latter, however, being inferior in its character` and power.

' Wha-t 1 claim as my invention, and desire to secure by Letters Patentis l. lhe construction and arrangement of a carspring, in such amanner lthat the bearing-surfaces of the upperframe E shall have onlytwo points of contact upon the spring I), when said points of contact are .yielding or movable, andv allowing the full free action preferable, as not being as .liable to.

www 2 of the spring, in the manner and for the purpose herei E, having formed upon them the cups B and F, when in described. l each of said frames and cups is cast iu one piece, in 2. The cups B and F, having formed upon their i the manner'nd for the purpose herein described, or bearing-surfaces the corrugations a a a a, in the mrmi whether said frames be made of Wood, and have sener and for the purpose herein described. l cured te them the cups B and F.'

3. 'lhe combination of the frame E, cups F, and TIMOTHY F. ALLYN. rubber G, wiil the springs D D, frame or bolster A, cups B, and rubber C, in the manner and for the pur- Witnesses: pese herein described. B. F. JAMES,

4. As an article of manufacture, the frames A and GODFREY MATHY. 

